June 22 (Reuters) - U.S. stocks dipped in low trading volume
on Wednesday, with traders focusing on Thursday's referendum on
whether Britain will remain part of the European Union.

Stocks rose early after data showed U.S. home resales rose
in May to a more than nine-year high, adding to retail sales and
international trade data that painted an upbeat picture of the
economy in the second quarter.

But the S&P 500 once more hit a ceiling at the 2,100 level,
which has been an area where sellers cluster.

Attention remained on Britain's Thursday vote. A poll
published on Wednesday showed a statistical tie, with the
'Leave' camp with 45 percent, just one point ahead of 'Remain,'
and 9 percent undecided. Oddsmakers, however, showed a clear
advantage for the 'Remain' camp.